Multiple vulnerabilities in Nextcloud user_oidc



Published: 2022-11-28
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-39338
CVE-2022-39339
CWE-ID CWE-79
CWE-319
Exploitation vector Network
Public exploit N/A
Vulnerable software
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user_oidc
Web applications / Modules and components for CMS

Vendor Nextcloud

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Stored cross-site scripting

EUVDB-ID: #VU69627

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-39338

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the Authorization Endpoint. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

user_oidc: 0.1.0 - 1.2.0

External links

http://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57
http://github.com/nextcloud/user_oidc/pull/496
http://hackerone.com/reports/1687410


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cleartext transmission of sensitive information

EUVDB-ID: #VU69630

Risk: Low

CVSSv3.1: 3.1 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-39339

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to software uses insecure communication channel to transmit sensitive information. A remote administrator can gain access to sensitive data.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

user_oidc: 0.1.0 - 1.2.0

External links

http://hackerone.com/reports/1687005
http://github.com/nextcloud/user_oidc/pull/495
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vff-cq8h-chhg


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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